which of the following describes an adventage that secondary sources have over primary sources for historians?

why did the economy of the 1920s resulted in quickly expanding prosperity for many Americans, but continued poverty for others

just olya [345]

Not all industries prospered in the Boom in the 1920s of America.

Old industries such as Coal and Cotton did terribly in the Boom as people became interested in the new products such as clothes made from artificial material(polyester). Coal was an old source of power, in the 1920s oil and electricity became greatly used.

Agriculture was also poor many farmers left the farmland to find work in the city. As new people emerged, new demands also appeared. Instead of fresh fruits and vegetables, Americans preferred cereals and bread which lead to the decrease of demands in fruits.

In the 1920s, Argentina and Canada began to supply the world crops which lead to the drops of demands from USA directly. Later in the year Prohibition(anything related to alcoholic drinks was made illegal) was introduced which caused an instant drop to the demands of barley(barley was used for making alcoholic drinks such as beer)

4 0

2 years ago

During the years of the Industrial Revolution

tino4ka555 [31]

Explanation:

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<u>Ashton held that it occurred roughly between 1760 and 1830. Rapid industrialization first began in Britain, starting with mechanized spinning in the 1780s, with high rates of growth in steam power and iron production occurring after 1800.</u>

5 0

2 years ago

Scientist have studied the return of plant life on mount st. helens ever since the volcano erupted in 1980. wildflowers began co

n200080 [17]

These changes are an example of the growth of a forest through ecological succession.

<h3>What is ecological succession?</h3>

Ecological succession refers to the structure in which the species and habitat over an area changes over a given period of time. It is the evolution of the new plants and animals over that area.

The complete question has been attached below.

In the above case, The plant life in the Mount St. helens will evolve again after 100 years which destroyed due to the volcanic eruptions in the year 1980. Thus this process is known as Ecological succession.

Through this process regeneration of the plants and wildflowers will take place and gradually the trees, plants, shrubs, species and creatures will settle there.

Learn more about the plant life here:

brainly.com/question/3753945

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